Historical Use of Chlorinated Solvents and Their Stabilizing Compounds - Environmental Investigation and Remediation - page 60

TABLE 1.29
Boiling-Point Contrasts for Stabilizers with Trichloroethylene

Maximum
Stabilizer (wt%)

Boiling Point
(°C)

Boiling-Point
Difference a (°C) Stabilizer Rank

Concentrated in Still Bottoms
Triethanolamine 1 335.4 248.4 1

p - t -Amyl phenol 0.01 262.5 175.5 2

Thymol 0.5 233 146 3

2-Isopropyl-5-methyl-
phenol

— 191 104 4

Phenol 0.5 181.75 94.75 5

Isoamyl alcohol — 132.5 45.5 6

Epichlorohydrin 5 117.9 30.9 7

Pyridine 0.5 115.2 28.2 8

2,2,4-Trimethylpentene-1
(Diisobutylene)

— 101.4 14.4 10

Lost to Vapor
Triethylamine — 89.30 2.3 11

Ethyl acetate — 77 − 10 12

1,2-Butylene oxide — 63.3 13

−23.7

Isobutyl alcohol — − 88.6 − 175.6 14

Source: See Appendix 2 for a tabulation of physical and chemical properties of solvent-stabilizer compounds with full
citations.
a Trichloroethylene's boiling point is 87°C.

TABLE 1.30
Boiling-Point Contrasts for Stabilizers with Perchloroethylene

Maximum
Stabilizer (wt%)

Boiling Point
(°C)

Boiling-Point
Difference a (°C)

Stabilizer Rank

Concentrated in Still Bottoms
2,6-di- tert -Butyl- p -
cresol

0.00008 265 144 1

Thymol 0.003 233 112 2

Benzotriazole — 204 83 3

Butoxymethyl oxirane 0.004 164 43 4

Cyclohexene oxide — 129.5 8.5 5

Epichlorohydrin — 117.9 −3.1 6

n -Methylmorpholine — 113 −8 7

Lost to Vapor
Diallylamine — 111 8

−10

Cyclohexane — 80.7 9

−40.3

Ethyl acetate — 77 10

−44

Source: See Appendix 2 for a tabulation of physical and chemical properties of solvent-stabilizer compounds with full
citations.
a Perchloroethylene's boiling point is 121.4°C.